Potential use of lignite fly ash for the control of acid generation from sulphidic wastes

Xenidis, A; Mylona, E; Paspaliaris, I

dc.contributor.author	Xenidis, A	en
dc.contributor.author	Mylona, E	en
dc.contributor.author	Paspaliaris, I	en
dc.date.accessioned	2014-03-01T01:18:14Z
dc.date.available	2014-03-01T01:18:14Z
dc.date.issued	2002	en
dc.identifier.issn	0956-053X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14877
dc.subject	Hydraulic Conductance	en
dc.subject	Kinetics	en
dc.subject	Potable Water	en
dc.subject	Water Permeability	en
dc.subject	Fly Ash	en
dc.subject.classification	Engineering, Environmental	en
dc.subject.classification	Environmental Sciences	en
dc.subject.other	Acids	en
dc.subject.other	Drainage	en
dc.subject.other	Fly ash	en
dc.subject.other	Hydraulic conductivity	en
dc.subject.other	Impurities	en
dc.subject.other	Lignite	en
dc.subject.other	Mechanical permeability	en
dc.subject.other	pH effects	en
dc.subject.other	Tailings	en
dc.subject.other	Acid generation	en
dc.subject.other	Chemical wastes	en
dc.subject.other	acid	en
dc.subject.other	drinking water	en
dc.subject.other	lignite	en
dc.subject.other	manganese	en
dc.subject.other	mineral	en
dc.subject.other	sulfide	en
dc.subject.other	zinc	en
dc.subject.other	carbon	en
dc.subject.other	acid mine drainage	en
dc.subject.other	fly ash	en
dc.subject.other	hydrochemistry	en
dc.subject.other	mitigation	en
dc.subject.other	pH	en
dc.subject.other	sulfide	en
dc.subject.other	article	en
dc.subject.other	fly ash	en
dc.subject.other	Greece	en
dc.subject.other	hydraulic conductivity	en
dc.subject.other	kinetics	en
dc.subject.other	laboratory test	en
dc.subject.other	permeability barrier	en
dc.subject.other	pH	en
dc.subject.other	priority journal	en
dc.subject.other	quality control	en
dc.subject.other	solid waste	en
dc.subject.other	waste disposal	en
dc.subject.other	waste management	en
dc.subject.other	water permeability	en
dc.subject.other	chemistry	en
dc.subject.other	human	en
dc.subject.other	industrial waste	en
dc.subject.other	methodology	en
dc.subject.other	particulate matter	en
dc.subject.other	sediment	en
dc.subject.other	water pollutant	en
dc.subject.other	Carbon	en
dc.subject.other	Geologic Sediments	en
dc.subject.other	Greece	en
dc.subject.other	Human	en
dc.subject.other	Hydrogen-Ion Concentration	en
dc.subject.other	Industrial Waste	en
dc.subject.other	Sulfides	en
dc.subject.other	Support, Non-U.S. Gov't	en
dc.subject.other	Waste Management	en
dc.subject.other	Water Pollutants, Chemical	en
dc.subject.other	Humans	en
dc.subject.other	Particulate Matter	en
dc.subject.other	Greece	en
dc.subject.other	Fraxinus	en
dc.title	Potential use of lignite fly ash for the control of acid generation from sulphidic wastes	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0956-053X(01)00053-8	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0956-053X(01)00053-8	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	In the present paper, the potential use of lignite fly ash in the control of acid generation from sulphidic tailings disposed of at Lavrion, Greece was studied. Long-term laboratory column kinetic tests were performed on tailings containing 27% S, which were homogeneously mixed with various amounts of fly ash, ranging from 10 to 63% w/w. The drainage quality of the columns was monitored over a test period of 600 days. Chemical and mineralogical characterisation of column solid residues was performed after a 270-day test period. The hydraulic conductivity of the mixtures was also measured to evaluate the potential of fly ash to form a low permeability layer. Based on the results, the addition of fly ash to sulphidic tailings, even at the lower amount, increased the pH of the drainage at values of 8.6-10.0 and decreased the dissolved concentrations of contaminants, mainly Zn and Mn, to values that meet the European regulatory limits for potable water. Higher fly ash addition to tailings, at amounts of 31 and 63% w/w also reduced the water permeability of material from 1.2x10(-5) cm/sec to 3x10(-7) and 2.5x10(-8) m/s, respectively. (C) 2002 Elsevier Science Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Waste Management	en
dc.identifier.doi	10.1016/S0956-053X(01)00053-8	en
dc.identifier.isi	ISI:000177616100009	en
dc.identifier.volume	22	en
dc.identifier.issue	6	en
dc.identifier.spage	631	en
dc.identifier.epage	641	en